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Interpretation of the presence of cervical human papillomavirus (HPV) in the absence of cytological abnormalities continues to evolve. In a nested case-control study, Swedish researchers assessed the odds of developing cervical intraepithelial neoplasia 2 or worse (CIN2+) in women who were HPV positive compared with those who were HPV negative; all 9047 women had normal cervical cytology at baseline. A total of 96 women who developed CIN2+ within 9 years' follow-up were matched with 5 controls (persistently normal cytology) each. All samples were tested retrospectively for baseline HPV status by type.
Any high-risk HPV was detected in 51% of cases and 14% of controls, and HPV-16/18 was detected in 31% of cases and 6% of controls. Among women…